Our rig has a leak on the hinge side of the entry door. I used my trusty leak detector (garden sprayer) to determine that it's leaking<br/>about 19" above the bottom of the door on the hinge side.<br/><br/>There is a rubber gasket that appears to be hollow with a stiff insert that's inside the gasket on the bottom 19", and the gasket seems to be attached to both the the door and...